I have a similar question...
A friend of mine with no OW status and no FF miles accumulated will be flying CWB/GRU/JFK all on a single Economy class ticket on LATAM. He plans to stay in New York 3 days and then fly to SEA. I'm considering using my AA miles to buy him a F ticket JFK/SEA on AA metal, hoping to connect the PNR and, in turn, make the entire routing eligible for Business Class baggage allowance, including the normally very restrictive intra-Brazil 23kg limitation. Will this work?
Complicating things, does the exNYC airport need to be exclusively exJFK or could he depart from any NYC area airport and connect the tickets?
Could I book DL metal (767 vs AA's 738) instead of a OW Partner for the JFK/SEA leg and still connect the tickets and get the Business Class baggage allowance for the entire itin?
TIA